Cylinder dressing tool



Jan. 27, 1942. H. A. BERKMAN CYLINDER DRESSING TOOL Filed March 8, 1940Patented Jan. 27, 1942 UNITED STATES PATENT OFFICE CYLINDER. DRESSINGTOOL Herbert A. Berkman, Chicago, Ill. assignor to Zim ManufacturingCompany, a corporatiou of Illinois Applicatiou Mal'ch 8, 1940, SerialN0. 322,933

ICI. 51-1842) 6 Claims.

In my prior Patent N0. 2136350 dated November 8 1938, I have illustrateda 11001 for removing ridges which form in engine eylinders by reason ofthe fast that the pistons do not travel clear to the ends of thecylinders. Viewed in one of its aspects, the present invention may besaid to have for its object 120 improve the construction of that toolwhile retaining the principle of operation thereof. In the patent thetool is shown as being of the reamer type. Instead of an eclged cutteran abrading element o1 hone may be employed. Viewed in another of itsaspects, the present invention may be saicl to have for its object tomodify the tool of the aforesaid patent to enable it successfully togrind or hone the interior of a cylinder.

The various features of novelty whereby my invention is charactefizedWill hereinafter be pointed out with particularity in the claims; but,for a full understanding of my invention and of iI;s objects andadvantages, reference may be had to the following detailed descriptiontaken in connection With the accompanying drawing, wherein:

Figure 1 is a top plan view of one of my improved tools, equipped withan abrading element or hone; Fig. 2 is a section on line 22 of Fig. l;Fig. 3 is a side view of a fragment of the tool, looking at the samefrom a point to the right of Fig. 2; Fig. 4 is a vlew, showing a stillsmaller fragment of the tool, and showing the side diametricallyopposite that appearing in Fig. 3; and Fig. 5 is a section on line 55 ofFig. 2, with the swinging holder for the blacle or hone and theadjustable plate on which the holder is mounted omitted.

Referring 130 the drawing, I represents a disk having a tubular stem 2rising from the center thereof; there being a long holt 3 extendingthrough the stem and. disk and into screwthreadecl engagement with aspider 4 underlying the plate I. As in my aforesaicl patent, the spidercooperates with fiat shoes 5 distributed around the same and adapted tobe spread apart by the spider 130 clamp the plate I firmly Within acylinder, with the tubular post 2 coaxial with the cylinder andprojecting from the latter. The only new thing in this part of the toolis that the post is shown as being quite long; the purpose being topermit the abrading tool o1 hone to be moved lengthwise of the samewhile being rotated, and thus prevent the cutting of grooves in thecylinder.

Overlying and resting upon I;he disk I is a plate 6 almost as large asthe disk and having a sleevelike hub I of consiclerable length risingtherefrom and surrounding the tubular post; I;he hub being considerablyshorter than the post, so that I;he plate 5 and its hub may not only berotated about the post but may also be moved up and down along the same,through a considerable distance.

The lower portion of the hub I has flat peripheral surfaces 8 While inthe upper end are diametrically opposed bayonet slots 9 opening upwardlyand adapted to receive plus or projections on the suitable sleeve wrenchwhich may be lowered in a position surrounding the post and which servesto turn the plate 6 and also to raise and lower the same.

Overlying and resting upon the p1ate 6 is another plate I0 which is morenearly in the form of a complete disk than is the platze 6. The plate 6is provided in the upper side With a radial groove II and the plate I0has on the under sicle a. tongue or rib I2 that fits slidably into thisgroove. There is also a large central winolow I4 in the plate I0 throughWhich the hub I extends; the Width of this window being equal to thedistance between two opposed parallel flat faces on the hub I. The longedges bounding ehe window are parallel to the tongue or rib I2, so thatthe tongue- I2 cooperating With the groove II and the window HIcooperating with I;he flat sided hub, both serve to prevent relativeturning movements be tween the p1ates 6 and I0 While permitting theplate I0 to slide radially of the post upon the plate 6. The p1ates 6and I0may be fastened together by a screw I5 passing down through anelongated slot I6 in the plate I0 and into a screw-threaded hole I'I inthe plate 6; the slot I6 being parallel With the groove I I and thelongsides of the winolow I4. Therefore, When the screw is loosened, theplatze I0 maybe slid back and fo1thand, in order to lock the platestogether against relative sliding movements, it.is only necessary totighten I;he screw.

At one end of the plate I0 is a thick arm I8 connected thereto by asuitable hinge pin I9 that is parallel I:he post 2. A long section atthe free end of the arm is reduced in thickness, as indicated ab 20,finger-like proportions, and lies on top of the plate I0. Fixed on theplate I0 behind the part 20 is a socket 2I in which is seated acompression spring 22 that protrudes from the socket and bears a%ainstthe rear face of the flnger member 20. On the plate I0 in front of thefinger 20 is an eccentric 24 or, rather, a cylindrical head or buttonhaving a stem 25 arranged eccentrically thereof so that 21 sei: in ametal shoe 28 having a rearwardly projecting ear 29. In 1;he outer orfront edge of the arm I8 is a wide notch 313 extending from 1:0p tobottom, and extending rearwardly from this notch into the b0dy of thearm is a pocket 3I. The shoe in its holder stands upright in the notch,While the ear extends into the pocket 3I. A pin 32 extends through theear and the solid portions of the arm on opposite sides of the ear tosupport the hone for swinging movements abou1; an

axis parallel wi1sh the 1:0p of the disk I, namely a1; right angles 130the axis of the post 2. The hone does not bottom in the notch When itstands parallel with the post, so tha1; 113 is free 110 rock through alimited angle to adjust itself to the face of the cylinder Wall.

I1: Will be seen that by placing 1;he spring 22 behind the free end ofthe arm I8, With the hone or cutter located at abou1: the middle of 1;hearm, the spring exer1zs a powerful leverage 011 the work-engagingelement and may therefore be much weaker or softer than is a springlying near the hinge. This is made possible loy employing as asupporting member for the arm I8 a plate Which is alrnost a completedisk. Not only does this construction provide a more satisfactorycontrol of 1;he yielding pressure on the work-engaging element than inmy earlier device laut, because of the broad bearing that the plate I0has on the plate 6, the device as a whole is much sturdier and in lessdanger of chatfaering than is 1she case where the work-engaging elementis carried from a series 013 arms, one supporting another, With thework-engaging element at one end of ehe series and the arm a1; the otherend of the series being rotatably supported by the post. II: Will alsobe seen tha1: by supporting the work-engagihg element so tha1; it mayrock in a plane radial 1;0 the cylinder which is being trea1sed, andmoving the element lengthwise of the cylinder as lt is being rotated,about 1:he axis of the cylinder, the surface which is being treated willalways be left smooth and free from grooves or scratches.

While I have illustrated and described With particularity only a singlepreferred form of my invention, I do not desire 110 be limited 1:0 theexact structural details thus illustrated and described: but intend 130cover all forms and arrangements which come within the definitions of myinvention consticuting the appended olaims.

I claim:

1. A machine for dressing the interior of a cylinder comprising a memberadapted to be secured in a cylinder, an element rotatable on said memberabout the axis of the cylinder, a 1:001 holder movably mounted on saidmember, and a long work-engaging 17001 mounted on said holder forrocking movements about an axis lying behind the same remote from bothends and at right angles to the axis of the cylinder.

2. A machine for dressing the interior of a cylinder comprising a memberadapted 170 be secured in a cylinder, an element rotatable on saidmember about the axis of 1;he cylinder, a cool holder hinged 130 said.member for swinging movements about an axis parallel 130 the aforesaidaxis, and a work-engaging tool mounted on said holder for rockingmovements transverse so the said hinge axis.

3. In a machine for treating cylinders, a member having a fiat bearingsurface and a post projecing from such surface, means to secure s'aidmember in a cylinder with the post coaxial With the latter, a flat plateresting on said bearing surface and having a hub surrounding said post,a second plate overlying the first plate and interlocked therewith so asto be slidable thereon in a given direction, the second plate havingtherein an elongated window through which said hub projects.

4. A machine for dressing the interior of a cylinder comprising a memberadapted be secured in a cylinder, an element rotatable 011 said memberabout the axis of the cylinder, a 13001 holder hinged. ab one end saidmember for swinging movements about an axis parallel the aforesaid axis,a work-engaging 17001 mounted on said holder for rocking movementstransverse 130 the said hinge axis, and a compression spring positionedbehind the free end of said holder and engaged at its ends wlth theholder and with a part fixed to said element.

5. A machine for dressing the interior of a cylinder comprising a memberhaving a long pos1; thereon, means 1:0 secure said member in a cylinderwith said post arranged axially of the latter, and a Support for awork-engaging element mounted on the pos1: for movements lengthwise ofand also around the latter, said support having a hub surrounding thepost and provided ab its free end with bayonet slots to receive plus onan instrument for turning the support and also moving it along 1:hepos1s.

6. In a machine for treating cylinders, a disk having a post projeotingfrom the center thereof, means 130 secure said disk in a cylinder withthe post coaxial With the latter, a fiat plate resting on said bearingdisk and having a hub surrounding said posc, a second fiat platzeoverlying the first plate and interlocked therewith so as 1:0 beslidable thereon in a given direction and to be held against rotationrelatively thereto, the second plate having therein an elongated Windowthrough which said hub projects, a device for fastening said platestogether against all relative movements, and a tool holder movablymounced on said second plate.

HERBERT A. BERKMAN.

